Class: Packer::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/vagrant-packer-plugin/patches/runner.rb

Defined Under Namespace

Classes: CommandExecutionError

Class Method Summary collapse

Class Method Details

.run!(*args, quiet: false) ⇒ Object

Raises:



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# File 'lib/vagrant-packer-plugin/patches/runner.rb', line 10

def self.run!(*args, quiet: false)
  cmd = Shellwords.shelljoin(args.flatten)

  debug = cmd.include? '-debug'

  status = 0
  stdout = ''
  stderr = ''
  if quiet && !debug
    # Run without streaming std* to any screen
    stdout, stderr, status = Open3.capture3(cmd)
  else
    # Run but stream as well as capture stdout to the screen
    # see: http://stackoverflow.com/a/1162850/83386
    Open3.popen3(cmd) do |std_in, std_out, std_err, thread|
      # read each stream from a new thread
      Thread.new do
        until (raw = std_out.getc).nil? do
          stdout << raw
          $stdout.write "#{raw}"
        end
      end
      Thread.new do
        until (raw_line = std_err.gets).nil? do
          stderr << raw_line
        end
      end

      Thread.new do
        std_in.puts $stdin.gets while thread.alive?
      end

      thread.join # don't exit until the external process is done
      status = thread.value
    end
  end
  raise CommandExecutionError.new(stderr) unless status == 0
  stdout
end